Not only can you assign duplicate keys (Option and Command keys, for example) to perform different functions, but KeyRemap4MacBook makes keys do different things depending on what app you're currently using (note that you can already do this to a point using Keyboard Shortcuts in System Preferences).

The app remaps most of the non-alphanumeric keys on the Macbook keyboard to a set of different functions. In the System Preferences window that opens, select the Keyboard preference pane. With his eject key now taking up space and not paying the rent, Erik looked around and found a free app called KeyRemap4MacBook. Caps LOCK Media eject key (older MacBooks, not for Thunderbolt 3 ports) Other keys Reset SMC on MacBooks that have T2 Chip (MacBook Pro and MacBook Air. OWC's Erik was already enjoying a speedy 480 GB SSD as his startup drive in the MacBook Pro, but wanted the luxury of more storage. This all got started when one of the employees at Other World Computing, the folks who make all of those fast internal SSDs for MacBook Pros and other devices, had the optical drive on his 2011 MacBook Pro removed and replaced with an OWC Data Doubler + 750 GB hard disk drive. 1- turn themachine on then immediately close the lid. Select the dropdown list next to the Command key and choose a different option. Select the keyboard that you want to change the mapping for. On the Keyboard tab, select Modifier Keys. Go to the Apple menu and select System Preferences. What do you do with a key that has outlived its usefulness? Give it another reason to live! Or, you can map it to a different modifier key by following these steps on a Mac OS. With no SuperDrive to speak of, the eject key was replaced with a tiny power button and the eject function moved to the F12 key next door. If you have a 2 button mouse, hold down the left click.If your computer has an eject key on the keyboard, restart the computer again, this time holding the eject key.Open a Terminal window and type in drutil. On my big iMac with its SuperDrive, it occasionally gets pressed when I need to kick out a backup DVD, but the rest of the time it sits alone. to Cult of MacHow to force eject a disc from your MacMac OS X - Force Ejecting a CDRestart your computer, and hold down the mouse button. The eject key sits in the upper right corner of most modern Apple keyboards.

Eject key for mac on windows keyboard